CN208194677U - A kind of arc erosion method eliminates the device of electric precipitation failure - Google Patents

Abstract

The utility model relates to electric fields.A kind of arc erosion method eliminates the device of electric precipitation failure, it include: 20V power supply, pressure regulator, test step-up transformer, first resistor, stand-off, inductance coil, electric precipitation inner cathode plate, capacitor, second resistance, 3rd resistor, one end joint test step-up transformer of output voltage regulator, the other end for testing step-up transformer connects first resistor, other end joint gap device, capacitor and the second resistance of first resistor, the other end of stand-off connects inductance coil, and the other end of inductance coil connects electric precipitation inner cathode plate；Other end joint test step-up transformer, capacitor, second resistance, 3rd resistor, electric precipitation inner cathode plate and the ground of output voltage regulator；Pressure regulator input terminal connects 20V power supply.After the present apparatus, hair unit maintenance down electric precipitation due to electric precipitation ground connection is reduced, improves unit hours run, energy-saving, cost efficiency.

Description

A kind of arc erosion method eliminates the device of electric precipitation failure

Technical field

The utility model relates to electric fields.

Background technique

Taiyuan Iron and Steel Co. energy source and power head factory possesses two 300MW generating sets, installed capacity 60MW, and every boiler is furnished with two Five electricity of dual chamber destatics deduster, is a kind of flue gas purifying equipment of high-effective dust-removing, its working principle is: dust dirt in flue gas Grain is when passing through high-voltage electrostatic field, and interelectrode negative ions and electronics collide and charged (or the lotus in ion diffusion motion Electricity), the grit of electronics and ion anisotropy electrode movement and product is attached on opposite electrode under the action of electric field force is taken, is passed through The modes such as rapping fall into the dust on electrode in collection ash bucket, make to be purified by the flue gas of electric precipitator, to reach The purpose of environment is protected in air conservation.

However, being bound to cause the stoppage in transit of failure electric field, efficiency of dust collection drop once there is body interior short circuit in electric precipitation operation It is low.And body interior short trouble is mostly since cathode line broken string, the fixed insulator of cathode plate or magnetosheath collection ash are excessive Etc. reasons and cause.Our factory 300MW generating set electric precipitation structure be steel structure frame, one, two electric fields be B5 prickle wire, three, Four, five electric fields are helix.And the usage quantity of helix is more, and the probability to break is larger, a helix broken string, An electric field is caused to be stopped transport, so that causing the operational percentage of the furnace deduster electric field reduces, dust removing effects are deteriorated.According to safety Evaluation criterion regulation, electric precipitator operational percentage should be greater than 95%, thus calculate it is found that, there is an electricity in 20 electricity+fields of a boiler Failure is out of service, and the electric field rate that comes into operation just only has 95%, exempts to reach standard by force, What is more, and sometimes one channel occurs two A, three broken strings just will appear the electric field that can not be put into operation by internal short-circuit at this time.In April, 2013,300MW1# boiler electric precipitation A4, B3 ground connection, use the boiled electric field of electric welding machine at that time, resume operation, another electric field is obtained in compressor emergency shutdown maintenance To thorough processing；In April, 2014,1# furnace B5, C4, C5, D5；2# furnace A4, B4, C4, D4, D5 electric precipitation ground connection, two boilers are opened There is smoke event in beginning, seriously threatens the safe operation of unit.How electric precipitator internal short-circuit is eliminated in operation, it is ensured that electricity The problem of deduster is normally and efficiently run just naturally is placed in front of us.

Summary of the invention

The mesh of the utility model provides a kind of dress of arc erosion method elimination electric precipitation failure aiming at the above problem It sets.

Purpose of the utility model is realized as follows: a kind of arc erosion method eliminates the device of electric precipitation failure, comprising: 20V power supply, pressure regulator, test step-up transformer, first resistor, stand-off, inductance coil, electric precipitation inner cathode plate, capacitor, Second resistance, 3rd resistor, one end joint test step-up transformer of output voltage regulator, test the other end of step-up transformer First resistor is connected, the other end of other end joint gap device, capacitor and the second resistance of first resistor, stand-off connects inductance The other end of coil, inductance coil connects electric precipitation inner cathode plate；The other end joint test of output voltage regulator, which boosts, to be become Depressor, capacitor, second resistance, 3rd resistor, electric precipitation inner cathode plate and ground；Pressure regulator input terminal connects 20V power supply.

Wherein, the electric precipitation inner cathode plate is hung in electric field by insulated porcelain sleeve set, by insulation wall bushing with Device connection.The clearance distance of stand-off is 0.4 cm -1cm.

The beneficial effects of the utility model are: the present apparatus is under unit operating condition, when ground fault occurs for electric precipitation When, and the ground fault that can not be eliminated using the methods of vibration, heating porcelain axis, then it is grounded using such elimination electric precipitation pole plate Device, impulse grounding dust make to be grounded dust under surge effect, blow ground connection dust or continuous discharge current, dry and connect It is located in dust, cuts bottom and eliminate ground fault.Reduce hair unit maintenance down electric precipitation due to electric precipitation is grounded, improves unit operation Hour.It is energy-saving, cost efficiency.After the present apparatus, generating set is at least reduced within 1 year because electric precipitation ground fault need to stop Machine is primary, and existing one machine of 300MW generating set is once switched on and needs 800,000 yuan, and one day on-road efficiency of unit is up to 1,000,000, then such to disappear Eliminating electricity and dust pole plate earthing or grounding means, an annual benefit is up to 180 with members up to ten thousand.

Detailed description of the invention

The utility model will be further described with reference to the accompanying drawing.

Fig. 1 is the circuit diagram of the utility model.

1. inside pressure regulator, 2. test step-up transformers, 3. first resistors, 4. stand-ofves, 5. inductance coils, 6. electric precipitations Cathode plate, 7. capacitors, 8. second resistances, 9. 3rd resistors.

Specific embodiment

As shown, purpose of the utility model is realized as follows: under operating condition, by applying when real ground fault Add external power supply (equipment of electric current can be provided, generally use electric welding machine), the method for residual broken string blown using high current --- Electric current ablation；Partial earth, but when voltage can not rise failure by the output of electric field silicon rectifying transformer high voltage itself, Current limit function, the method for shunt-wound capacitance on electric precipitation cathode --- arc erosion method, this two methods (electric current, electricity Arc ablation) it is used cooperatively, electric precipitation ground fault is eliminated in time.

It is handled by electric precipitation ground fault several times, analyzes it, devise a kind of elimination electricity as shown in the figure and remove Dirt pole plate earthing or grounding means: using existing electric insulation pressure test pressure regulator, test step-up transformer, low tension is risen into 10KV More than, it by first resistor, charges to capacitor, after waiting voltages to rise to stand-off electric discharge pressure, sphere gap breakdown powers on capacitor Pressure, electric energy are added on electric precipitation anode, are carried out electric shock electric discharge to the grounding point of dust, are blown grounding point, after can not blow, then Using frequent discharge current, so that grounding point dust is generated heat, dry ground connection dust, finally lead to rapping apparatus, dust is fallen in vibration, eliminates Ground fault.Wherein, input voltage can be carried out by setting value requirement, and voltage is added on capacitor.

The effect of first resistor is limitation booster to capacitance charging current, prevents booster overcurrent scaling loss；Stand-off is It is charged to certain electric energy in capacitor, voltage reaches just anti-electric when voltage rating, adjusts gap size, makes discharge voltage in capacitor Under the specified electricity of device, it is generally set to 9.8KV, second resistance serves to capacitor protection, and after power failure, capacitor passes through second resistance Electric discharge；3rd resistor protects stand-off；Inductance coil is to limit instantaneous sphere gap electric discharge to be grounded dust by electric precipitation Electric current and capacitor discharge current.

The foregoing is merely specific embodiment of the utility model, but the structure feature of the utility model institute protection scope is simultaneously Without being limited thereto, in the field of the utility model, made changes or modifications all cover at this any those skilled in the art In the scope of the patents of utility model.

Claims (3)

1. the device that a kind of arc erosion method eliminates electric precipitation failure, it is characterised in that: include: 20V power supply, pressure regulator (1), examination Test step-up transformer (2), first resistor (3), stand-off (4), inductance coil (5), electric precipitation inner cathode plate (6), capacitor (7), second resistance (8), 3rd resistor (9), one end joint test step-up transformer (2) of pressure regulator (1) output end, test rise The other end of pressure transformer (2) connects first resistor (3), the other end joint gap device (4) of first resistor (3), capacitor (7) and The other end of second resistance (8), stand-off (4) connects inductance coil (5), in the other end connection electric precipitation of inductance coil (5) Portion's cathode plate (6)；The other end joint test step-up transformer (2) of pressure regulator (1) output end, capacitor (7), second resistance (8), 3rd resistor (9), electric precipitation inner cathode plate (6) and ground；Pressure regulator input terminal connects 20V power supply.

2. the device that a kind of arc erosion method according to claim 1 eliminates electric precipitation failure, it is characterised in that: described Electric precipitation inner cathode plate (6) is hung in electric field by insulated porcelain sleeve set, is connect by insulation wall bushing with the device.

3. the device that a kind of arc erosion method according to claim 1 eliminates electric precipitation failure, it is characterised in that: stand-off (4) clearance distance is 0.4 cm -1cm.